—Tom, I don’t have a soccer ball. Let’s play ______ ping-pong.—OK. I have two ping-pong bats.
John is ______dishonest boy. He has______ useful book.
–What about going for a walk, Sally? -_______
-_____ the population of China?
.-Could you give me a______ on how to learn English_____?
-Robert is _____ to face dangers. Don’t be worried about him. -I think so.